JP3744528B2 - Junction box for solar cell module - Google Patents

Junction box for solar cell module Download PDF

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JP3744528B2
JP3744528B2 JP2004190310A JP2004190310A JP3744528B2 JP 3744528 B2 JP3744528 B2 JP 3744528B2 JP 2004190310 A JP2004190310 A JP 2004190310A JP 2004190310 A JP2004190310 A JP 2004190310A JP 3744528 B2 JP3744528 B2 JP 3744528B2
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terminal
connection box
solar cell
terminals
relay
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JP2004274088A (en
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正紀 桑原
誠 東小薗
裕史 渡辺
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Sumitomo Wiring Systems Ltd
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Sumitomo Wiring Systems Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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Description

本発明は、太陽電池モジュール用接続箱に関するものである。   The present invention relates to a junction box for a solar cell module.

図１３に示されるように、複数の太陽電池モジュール（以下、単に「モジュール」という）１を家屋の屋根等にマトリックス状に配設して太陽光発電が従来より行われている。各モジュール１には、モジュール間接続箱３が設けられており、この接続箱３を介して複数のモジュール１を並列、直列に接続することにより、各モジュール１からの電力を１４０から３２０Ｖでインバータ５に入力し、インバータ５にて直流から交流に変換するようになっている。   As shown in FIG. 13, solar power generation is conventionally performed by arranging a plurality of solar cell modules (hereinafter simply referred to as “modules”) 1 in a matrix on a roof of a house or the like. Each module 1 is provided with an inter-module connection box 3. By connecting a plurality of modules 1 in parallel and in series via the connection box 3, the power from each module 1 is converted into an inverter at 140 to 320 V. 5 and is converted from direct current to alternating current by the inverter 5.

モジュール１には、図１４に示されるように、マトリックス状に配設された複数の太陽電池セル（以下、単に「セル」という）７と、接続箱３とが備えられている。また、接続箱３には、他のモジュール１、あるいはインバータ５等への接続のためのプラス側およびマイナス側の出力ケーブル１１，１３が接続されており、その各出力ケーブル１１，１３の末端部には、他のケーブルのコネクタとの接続用の防水コネクタ１５，１７がそれぞれ接続されている。   As shown in FIG. 14, the module 1 includes a plurality of solar cells (hereinafter simply referred to as “cells”) 7 and a junction box 3 arranged in a matrix. Further, the connection box 3 is connected to the output cables 11 and 13 on the plus side and the minus side for connection to other modules 1 or the inverter 5 and the like, and the end portions of the output cables 11 and 13 are connected. Are connected to waterproof connectors 15 and 17 for connection with connectors of other cables.

図１５は、本願の発明に際して本願とは別個に提案されたモジュール１の電気的構成を示すブロックである。モジュール１に備えられる各セル７は互いに直列接続され、マイナス側からプラス側方向に所定の個数ごとに複数のセル群９に分割されている。その各セル群９には、各セル７の出力電圧と逆方向となるようにバイパスダイオード２１が並列接続されており、逆バイアスされた各セル７の電流を各バイパスダイオード２１によってバイパスするようになっている。これによって、特定のセル７、例えばセル７ａが影になった場合に、耐電圧以上の逆起電力がセル７ａに印加されてセル７ａが破損するのを防止することができるようになっている。   FIG. 15 is a block diagram showing an electrical configuration of the module 1 proposed separately from the present application in the present invention. Each cell 7 provided in the module 1 is connected in series with each other, and is divided into a plurality of cell groups 9 by a predetermined number from the minus side to the plus side. In each cell group 9, a bypass diode 21 is connected in parallel so as to be in a direction opposite to the output voltage of each cell 7, and the current of each reversely biased cell 7 is bypassed by each bypass diode 21. It has become. As a result, when a specific cell 7, for example, the cell 7a, is shaded, it is possible to prevent the cell 7a from being damaged by applying a back electromotive force higher than the withstand voltage to the cell 7a. .

図１６は、モジュール１に備えられる端子の取付方法が適用された接続箱３の内部構成を示す平面図である。この取付けに関する技術も、本願発明に際して本願とは別個に提案されたものである。図１７はその断面図である。この接続箱３は、接続箱本体３１および蓋３３からなる箱体３５と、その箱体３５内に備えられる複数の中継端子（端子）３７と、複数のバイパスダイオード２１とを備えて構成されている。各セル群９、各バイパスダイオード２１および出力ケーブル１１，１３は、図１５に示されるように、複数の中継端子３７を介して互いに電気接続されるようになっている。   FIG. 16 is a plan view showing the internal configuration of the junction box 3 to which the terminal mounting method provided in the module 1 is applied. The technique relating to this attachment is also proposed separately from the present application in the present invention. FIG. 17 is a sectional view thereof. The connection box 3 includes a box body 35 including a connection box body 31 and a lid 33, a plurality of relay terminals (terminals) 37 provided in the box body 35, and a plurality of bypass diodes 21. Yes. As shown in FIG. 15, each cell group 9, each bypass diode 21, and output cables 11 and 13 are electrically connected to each other via a plurality of relay terminals 37.

この接続箱３では、複数の中継端子３７は互いに分離された状態で製造され、別々に接続箱本体３１に取付けられるようになっており、バイパスダイオード２１は、各中継端子３７を接続箱本体３１に取付けた後、その中継端子３７に半田付け３８によって接続するようになっている。   In the connection box 3, the plurality of relay terminals 37 are manufactured in a state of being separated from each other and are separately attached to the connection box body 31. The bypass diode 21 connects each relay terminal 37 to the connection box body 31. After being attached to the relay terminal 37, it is connected to the relay terminal 37 by soldering 38.

各中継端子３７は、ネジ固定用のネジ孔３７ａが設けられており、ネジ３９によって接続箱本体３１にネジ止めされるようになっている。また、各出力ケーブル１１，１３の接続箱３側の末端部には、ネジ３９が挿通されるネジ孔を有する接続端子４１が圧着接続されており、中継端子３７のネジ止めに伴って、接続端子４１が中継端子３７に接続されるようになっている。すなわち、ネジ３９は、中継端子３７の接続箱本体３１への固定と、中継端子３７と出力ケーブル１１，１３との電気接続との役割を担っている。   Each relay terminal 37 is provided with a screw hole 37 a for fixing a screw, and is screwed to the connection box main body 31 by a screw 39. In addition, a connection terminal 41 having a screw hole through which a screw 39 is inserted is crimped and connected to the terminal portion of each output cable 11, 13 on the side of the connection box 3. The terminal 41 is connected to the relay terminal 37. That is, the screw 39 plays a role of fixing the relay terminal 37 to the junction box body 31 and electrical connection between the relay terminal 37 and the output cables 11 and 13.

また、接続箱本体３７に取付けられた各中継端子３７には、各セル群９からの中継ケーブル４３が半田付け４５によって接続されている。各出力ケーブル１１，１３は、接続箱本体３１の側壁部に設けられた貫通孔４７を介して箱体３５内部に引込まれ、その内部にて、固定金具（固定部材）４９により接続箱本体３１に固定されている。固定金具４９は、ネジ５１によって接続箱本体３１に固定されている。   Further, the relay cable 43 from each cell group 9 is connected to each relay terminal 37 attached to the junction box body 37 by soldering 45. Each output cable 11, 13 is drawn into the box body 35 through a through hole 47 provided in the side wall portion of the connection box main body 31, and inside the connection box main body 31 by a fixing bracket (fixing member) 49. It is fixed to. The fixing bracket 49 is fixed to the connection box main body 31 with screws 51.

しかしながら、従来の端子の取付方法では、中継端子３７をネジ止めによって接続箱本体３１に固定するようになっているので、ネジ止めのためのネジ３９等が必要であり、部品点数が嵩み高コストであるとともに、煩雑なネジ止め作業が個々の中継端子３７ごとに必要であり、組立作業が複雑化するという問題がある。   However, in the conventional terminal mounting method, the relay terminal 37 is fixed to the connection box main body 31 by screwing. Therefore, a screw 39 or the like for screwing is necessary, and the number of parts is high. In addition to cost, a complicated screwing operation is required for each relay terminal 37, and there is a problem that the assembly operation becomes complicated.

そこで、本発明は前記問題点に鑑み、部品点数を削減し、組立工程を簡略化することができる太陽電池モジュール用接続箱を提供することを目的とする。   Then, in view of the said problem, this invention aims at providing the connection box for solar cell modules which can reduce a number of parts and can simplify an assembly process.

上記の目的を達成するために、請求項１の発明は、接続箱内には、複数の太陽電池セル群同士を直列に接続させるために、それぞれが対応する前記太陽電池セル群と中継ケーブルを介して接続された複数の端子が並列して収納されるとともに、前記端子のうち、両端に位置するものには前記複数の太陽電池セル群からの起電力を取り出すための出力ケーブルが接続され、さらに隣接する端子同士の間には、対応する前記太陽電池セル群に対して並列となるようにバイパスダイオードが接続される太陽電池モジュール用接続箱であって、前記各端子は隣り合うもの同士が切除可能な切り離し部によって接続された連続体とされ、かつこの連続体はさらに前記バイパスダイオードが接続されてユニット化された状態で前記接続箱内へ設置可能であり、かつこのユニット化された状態における各端子は前記接続箱の底面から突設されたボス部によって位置決めされて固定がなされることを特徴とするものである。
In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that, in the connection box, in order to connect a plurality of solar battery cell groups in series, the corresponding solar battery cell groups and relay cables respectively correspond to each other. A plurality of terminals connected in parallel are housed in parallel, and among the terminals, output cables for taking out electromotive forces from the plurality of solar cell groups are connected to those located at both ends, Furthermore, between adjacent terminals, it is a solar cell module connection box to which a bypass diode is connected so as to be parallel to the corresponding solar cell group, and each terminal is adjacent to each other. It is a continuous body connected by an excisable disconnection section, and this continuous body can be installed in the junction box in a state where the bypass diode is further connected and unitized. And the terminals in the unitized state is characterized in that the fixedly positioned by a boss projecting from the bottom surface of the junction box is made.

また、請求項２の発明は、請求項１記載のものにおいて、前記端子には方形の取付孔が開口する一方、前記ボス部はこの取付孔に挿通される方形に形成され、かつ挿通後に熱圧潰されることにより前記端子は抜け止めがなされることを特徴とするものである。
請求項３の発明は、請求項２記載のものにおいて、前記各端子は、前記基部とこの基部から少なくとも三方向へ張り出して前記中継ケーブル、バイパスダイオードあるいは出力ケーブルと接続される突出部とを備えて形成されていることを特徴とするものである。 According to a second aspect of the present invention, in the first aspect of the present invention, the terminal has a rectangular mounting hole, while the boss portion is formed in a rectangular shape to be inserted into the mounting hole, and is heated after being inserted. The terminal is prevented from being pulled out by being crushed.
According to a third aspect of the present invention, in the second aspect of the present invention, each of the terminals includes the base portion and a protruding portion that protrudes from the base portion in at least three directions and is connected to the relay cable, the bypass diode, or the output cable. It is characterized by being formed.

本発明によれば、端子の組付けにあたり、端子は接続箱の底面に突設されたボス部によって位置決めされて固定がなされるため、従来のようにネジや、その煩雑なネジ止め作業が不要であり、また組付け位置のばらつきが少なくなり、中継ケーブル等に対する接続作業も容易となる。   According to the present invention, when assembling the terminals, the terminals are positioned and fixed by the bosses projecting from the bottom surface of the connection box, so that conventional screws and complicated screwing work are not required. In addition, variations in the assembling position are reduced, and connection work to a relay cable or the like is facilitated.

＜構成＞
図１は本発明の一実施形態に係る端子の取付方法が適用された太陽電池モジュール間接続箱の内部構成を示す平面図であり、図２はその断面図である。なお、本実施形態の太陽電池モジュール間接続箱６１も、従来の接続箱３と同様にして図１４に示されるモジュール１に備えられるようになっており、また、モジュール１を構成する複数のセル群９、各セル群９ごとに並列に設けられるバイパスダイオード２１、および出力ケーブル１１，１３の回路構成に関しても図１５に示すものと同様であり、図１６および図１７に示される接続箱３と対応する部分には同一の参照符号を付して説明を省略する。 <Configuration>
FIG. 1 is a plan view showing an internal configuration of a connection box between solar cell modules to which a terminal mounting method according to an embodiment of the present invention is applied, and FIG. 2 is a sectional view thereof. In addition, the connection box 61 between solar battery modules of this embodiment is also provided in the module 1 shown in FIG. 14 similarly to the conventional connection box 3, and a plurality of cells constituting the module 1 are also provided. The circuit configuration of the group 9, the bypass diode 21 provided in parallel for each cell group 9, and the output cables 11, 13 is the same as that shown in FIG. 15, and the connection box 3 shown in FIGS. Corresponding portions are denoted by the same reference numerals and description thereof is omitted.

図３はこの接続箱６１に用いられる中継端子６３が複数連続的に連なって形成された端子連続体６５の平面図であり、図４は接続箱６１に備えられる接続箱本体６７の中継端子６３等が備えられる前の状態の平面図であり、図５はそのＶ−Ｖ断面図であり、図６はそのVI−VI断面図であり、図７はそのVII−VII断面図であり、図８はそのVIII−VIII断面図であり、図９はその側面図である。   FIG. 3 is a plan view of a terminal continuum 65 in which a plurality of relay terminals 63 used in the connection box 61 are continuously connected. FIG. 4 is a plan view of the relay terminal 63 of the connection box main body 67 provided in the connection box 61. 5 is a cross-sectional view taken along the line VV, FIG. 6 is a cross-sectional view taken along the line VI-VI, and FIG. 7 is a cross-sectional view taken along the line VII-VII. 8 is a sectional view taken along the line VIII-VIII, and FIG. 9 is a side view thereof.

端子連続体６５は、図３に示されるように、幅細の切離し部６９を介して複数、ここでは４つの中継端子６３が連続的に連なったものであり、単一の金属板より打ち抜き加工等によって形成されている。この端子連続体６５の各中継端子６３は、接続箱本体６７への取付位置に対応した所定の配列状態で、ここでは一定間隔を開けて一列に連なるように打ち抜かれており、このままの連続した状態で接続箱本体６７への取付けが行われるようになっている。なお、この各中継端子６３が電気回路内で回路接続で果たす役割は、従来の中継端子３７と同様であり、ここでは詳細な説明は省略する。   As shown in FIG. 3, the terminal continuous body 65 is formed by continuously connecting a plurality of, here, four relay terminals 63 via a narrow cut-off portion 69, and punching from a single metal plate. Etc. are formed. The relay terminals 63 of the terminal continuum 65 are punched out in a predetermined arrangement state corresponding to the attachment position to the connection box body 67, and are continuously arranged in a row at a predetermined interval. The attachment to the junction box main body 67 is performed in this state. The role played by each relay terminal 63 in the circuit connection in the electric circuit is the same as that of the conventional relay terminal 37, and detailed description thereof is omitted here.

その４つの中継端子６３のうち、中間の２つの中継端子６３ａはＴ字型を有しており、両側の２つの中継端子６３ｂは十字型を有しており、各切離し部６９は、隣接する各中継端子６３の連続方向に沿った左右の突出部７１の先端部同士を接続している。   Of the four relay terminals 63, the two intermediate relay terminals 63a have a T-shape, the two relay terminals 63b on both sides have a cross shape, and the separation portions 69 are adjacent to each other. The leading ends of the left and right projecting portions 71 along the continuous direction of each relay terminal 63 are connected to each other.

また、各中継端子６３の中央部には、接続箱本体６７への取付用の取付孔７３が設けられており、各中継端子６３の上側の突出部７５には、各セル群９に接続される中継ケーブル４３の半田接続用の接続孔７７が設けられており、左右の突出部７１には、バイパスダイオード２１の接続端子２１ａの半田接続用の接続孔７９がそれぞれ設けられており、両側（電流通流方向最下流側および最上流側）の中継端子６３ｂの下側の突出部８１にはプラスおよびマイナス側の出力ケーブル１１，１３が溶接によってそれぞれ接続されるようになっている。   Further, an attachment hole 73 for attachment to the junction box body 67 is provided at the center of each relay terminal 63, and the protruding portion 75 on the upper side of each relay terminal 63 is connected to each cell group 9. A connecting hole 77 for solder connection of the relay cable 43 is provided, and a connecting hole 79 for solder connection of the connection terminal 21a of the bypass diode 21 is provided in the left and right protrusions 71, respectively. The output cables 11 and 13 on the plus and minus sides are connected by welding to the lower projection 81 of the relay terminal 63b on the most downstream side and the most upstream side in the current flow direction, respectively.

樹脂成型品である接続箱本体（取付台）６７は、その上側開口部に装着される蓋８３とともに箱体８５を構成している。その接続箱本体６７には、端子連続体６５の中継端子６３と同数、ここでは４つの端子用ボス部８７と、その側壁部を貫くように２箇所に延設されたケーブル保持部８９，９１と、接続箱本体６７の側壁部の内側におけるケーブル保持部８９，９１の両側に対をなして設けられる固定金具用ボス部９３，９５とが接続箱本体６７と一体に設られている。   A junction box main body (mounting base) 67, which is a resin molded product, constitutes a box body 85 together with a lid 83 attached to the upper opening thereof. The junction box body 67 has the same number as the relay terminals 63 of the terminal continuous body 65, here four terminal boss portions 87, and cable holding portions 89, 91 extending in two locations so as to penetrate the side wall portions. Also, fixing metal bosses 93 and 95 provided in pairs on both sides of the cable holding portions 89 and 91 inside the side wall portion of the connection box main body 67 are integrally provided with the connection box main body 67.

４つの端子用ボス部８７は、端子連続体６５の各端子６３の取付位置、すなわち連設された中継端子６３の配列に対応させて接続箱本体６７の底部中央に一列、図４では左右一列に所定の間隔を開けて突設されている。２つのケーブル保持部８９，９１は、断面がＵ字状の溝８９ａ，９１ａを有しており、出力ケーブル１１，１３は、この溝８９ａ，９１ａ内に収容され、この溝８９ａ，９１ａを通って箱体８５内に引き込まれるようになっている。対をなす２組の固定金具用ボス部９３，９５は、出力ケーブル１１，１３を接続箱本体６７に固定する固定金具９７，９９を固定するためのものである。   The four terminal bosses 87 are arranged in a row at the center of the bottom of the connection box body 67 corresponding to the mounting positions of the terminals 63 of the terminal continuum 65, that is, the arrangement of the relay terminals 63 connected in series, in FIG. Projecting with a predetermined interval. The two cable holding portions 89 and 91 have grooves Ua and 91a having a U-shaped cross section, and the output cables 11 and 13 are accommodated in the grooves 89a and 91a, and pass through the grooves 89a and 91a. And is drawn into the box 85. The two pairs of fixing metal bosses 93 and 95 forming a pair are for fixing the fixing metal parts 97 and 99 for fixing the output cables 11 and 13 to the connection box main body 67.

出力ケーブル１１，１３の固定に用いられる固定金具９７，９９は、平板状の部材の中央のケーブル当接部を出力ケーブル１１，１３の外周に沿うように弓状に湾曲させて構成されており、そのケーブル当接部の両側には、接続箱本体６７の固定金具用ボス部９３，９５が挿通される取付孔９７ａ，９９ａ（図１１参照）が設けられている。   The fixing brackets 97 and 99 used for fixing the output cables 11 and 13 are configured by bending the central cable contact portion of the flat plate-like member in an arc shape along the outer periphery of the output cables 11 and 13. Mounting holes 97a and 99a (see FIG. 11) through which the fixing bracket bosses 93 and 95 of the connection box main body 67 are inserted are provided on both sides of the cable contact portion.

＜組立工程＞
接続箱６１の組立工程についての説明を行う。まず、図１０に示されるように、端子連続体６５の各中継端子６３の互いに隣り合う接続孔７９に、３つのバイパスダイオード２１の接続端子２１ａを半田付け３８により接続するととももに、端子連続体６５の両端の中継端子６３ｂの突出部８１に出力ケーブル１１，１３を溶接１０１により接続する。このとき、３つのバイパスダイオード２１は、各中継端子６３を介して直列状態で出力ケーブル１１，１３と接続されるようになっている。 <Assembly process>
The assembly process of the connection box 61 will be described. First, as shown in FIG. 10, the connection terminals 21a of the three bypass diodes 21 are connected to the connection holes 79 adjacent to each other of the relay terminals 63 of the terminal continuous body 65 by soldering 38, and the terminals are connected continuously. The output cables 11 and 13 are connected to the protrusions 81 of the relay terminals 63b at both ends of the body 65 by welding 101. At this time, the three bypass diodes 21 are connected to the output cables 11 and 13 in series via the relay terminals 63.

続いて、図１１に示されるように、バイパスダイオード２１および出力ケーブル１１，１３が接続された端子連続体６５を、その取付孔７３に各端子用ボス部８７が挿通されるように接続箱本体６７内に設置する。このとき、各出力ケーブル１１，１３は、ケーブル保持部８９，９１の溝８９ａ，９１ａ内に挿入し、その上から固定金具９７，９９を、その取付孔９７ａ，９９ａに固定金具用ボス部９３，９５が挿通されるように接続箱本体６７に設置する。   Subsequently, as shown in FIG. 11, the terminal box 65 to which the bypass diode 21 and the output cables 11 and 13 are connected is connected to the connection box body so that the terminal bosses 87 are inserted into the mounting holes 73. It is installed in 67. At this time, the output cables 11 and 13 are inserted into the grooves 89a and 91a of the cable holding portions 89 and 91, and the fixing brackets 97 and 99 are inserted from above into the mounting holes 97a and 99a. , 95 are inserted into the junction box main body 67 so as to be inserted.

さらに続いて、図１２に示されるように、各ボス部８７，９３，９５を加熱軟化させて上方から圧潰し、各中継端子６３および各固定金具９７，９９を接続箱本体６７に固定する。この熱圧潰の方法としては、高温に加熱した熱圧潰手段をボス部８７，９３，９５に押付けて熱圧潰する方法や、所定の超音波加熱手段によりボス部８７，９３，９５を加熱軟化させつつ圧潰する方法等が用いられる。この固定状態において、出力ケーブル１１，１３は、ケーブル保持部８９，９１の溝８９ａ，９１ａの内周面と固定金具９７，９９とによって保持固定されている。   Subsequently, as shown in FIG. 12, the boss portions 87, 93, 95 are heated and softened and crushed from above, and the relay terminals 63 and the fixing brackets 97, 99 are fixed to the junction box body 67. As a method of this thermal crushing, a heat crushing means heated to a high temperature is pressed against the boss portions 87, 93, 95, or the boss portions 87, 93, 95 are heated and softened by a predetermined ultrasonic heating means. A crushing method or the like is used. In this fixed state, the output cables 11 and 13 are held and fixed by the inner peripheral surfaces of the grooves 89 a and 91 a of the cable holding portions 89 and 91 and the fixing brackets 97 and 99.

そして、図１に示されるように、各中継端子６３間の切離し部６９を所定の切除手段により切除するとともに、各中継端子６３の接続孔７７に各セル群９に接続される中継ケーブル４３を半田付け４５により接続して、蓋８３を装着する。   Then, as shown in FIG. 1, the cut-off portion 69 between each relay terminal 63 is cut by a predetermined cutting means, and the relay cable 43 connected to each cell group 9 is connected to the connection hole 77 of each relay terminal 63. The lid 83 is attached by connecting by soldering 45.

以上のように、本実施形態によれば、中継端子６３に設けられた方形の取付孔７３に、方形に形成された接続箱本体６７の端子用ボス部８７を挿通して、その端子用ボス部８７を加熱軟化させて圧潰するという簡単な工程により、中継端子６３が接続箱本体６７に固定されるようになっているので、従来のようにネジや、その煩雑なネジ止め作業が不要であり、部品点数を削減し、組立工程の簡略化および低コスト化が図れるとともに、煩雑なトルク管理の必要なネジ止めが不要であるので、中継端子６３の取付工程の自動化が容易であるという利点がある。   As described above, according to the present embodiment, the terminal boss portion 87 of the connection box body 67 formed in the square is inserted into the rectangular attachment hole 73 provided in the relay terminal 63, and the terminal boss is inserted. The relay terminal 63 is fixed to the junction box main body 67 by a simple process of softening and crushing the portion 87 by heating, so that a screw and its complicated screwing work as in the past are unnecessary. There is an advantage that the number of parts can be reduced, the assembly process can be simplified and the cost can be reduced, and screwing that requires complicated torque management is unnecessary, so that the mounting process of the relay terminal 63 can be easily automated. There is.

また、複数の中継端子６３の接続箱本体６７への固定は、切離し部６９を介して連続した状態で行われるので、複数の中継端子６３を一度に接続箱本体６７に設置することができ、また、各中継端子６３の取付孔７３に挿通させた接続箱本体６７の端子用ボス部８７を一度に加熱して圧潰させて、複数の中継端子６３の取付けを一度に行うこともでき、非常に作業効率がよい。   In addition, since the plurality of relay terminals 63 are fixed to the junction box body 67 in a continuous state via the disconnecting portion 69, the plurality of relay terminals 63 can be installed in the junction box body 67 at one time. Moreover, the terminal boss portions 87 of the junction box body 67 inserted through the mounting holes 73 of the relay terminals 63 can be heated and crushed at a time, so that a plurality of relay terminals 63 can be attached at one time. Work efficiency is good.

さらに、従来ネジ止めによって接続していた出力ケーブル１１，１３が溶接１０１によって中継端子６３に接続されることにより、中継端子６３と出力ケーブル１１，１３等の他の回路部品との接続箇所からネジ止めによる接続箇所を完全に排除することができ、その結果、部品点数を削減して組立工程の簡略化および低コスト化を図ることができるともに、接続の信頼性を向上させることができ、また、出力ケーブル１１，１３の接続工程の自動化が容易であるという利点がある。   Further, the output cables 11 and 13 that have been connected by screwing in the past are connected to the relay terminal 63 by welding 101, so that a screw is connected from the connection point between the relay terminal 63 and the other circuit parts such as the output cables 11 and 13. It is possible to completely eliminate the connection part by stopping, and as a result, it is possible to reduce the number of parts, simplify the assembly process and reduce the cost, and improve the connection reliability. There is an advantage that the connection process of the output cables 11 and 13 can be easily automated.

また、各バイパスダイオード２１の各中継端子６３への半田付け接続は、各中継端子６３が作業性の悪い接続箱本体６７内に取付けられる前に、しかも複数の中継端子６３が未だ切離されておらず切離し部６９によって互いに位置決め固定された状態で行われるので、バイパスダイオード２１の接続工程の自動化が容易であり、自動化により組立工程の大幅な低コスト化を図ることができる。   Further, the soldering connection of each bypass diode 21 to each relay terminal 63 is performed before the relay terminals 63 are separated from each other before the relay terminals 63 are mounted in the connection box body 67 having poor workability. Since it is performed in a state of being positioned and fixed to each other by the separating portion 69, the connection process of the bypass diode 21 can be easily automated, and the assembly process can be greatly reduced in cost by the automation.

さらに、出力ケーブル１１，１３を固定するための固定金具９７，９９も、中継端子６３と同様に、その取付孔９７ａ，９９ａに金具固定用ボス部９３，９５を挿通させてそのボス部９３，９５を加熱圧潰するだけで接続箱本体６７に取付けられるようになっているとともに、端子用ボス部８７および固定金具用ボス部９３，９５の加熱圧潰を同一工程で行うことができるので、従来のようにネジや、その煩雑なネジ止め作業が不要であり、部品点数を削減し、組立工程の簡略化および低コスト化が図れる。   Further, the fixing brackets 97 and 99 for fixing the output cables 11 and 13 are also inserted into the mounting holes 97a and 99a through the fitting fixing bosses 93 and 95, similarly to the relay terminal 63, so that the bosses 93 and 95 can be attached to the junction box body 67 simply by heating and crushing, and the terminal boss portion 87 and the fixing metal boss portions 93 and 95 can be heated and crushed in the same process. Thus, the screw and its complicated screwing work are not required, the number of parts can be reduced, and the assembling process can be simplified and the cost can be reduced.

なお、本実施形態では、接続箱６１を各モジュールごとに設け、接続箱６１に備えられる各中継端子６３を介してモジュール１内の各セル群９にバイパスダイオード２１を並列接続することにより、この接続箱６１の各バイパスダイオード２１によって単一のモジュール１内に備えられる各セル群９のバイパスを行うようにしたが、一つのモジュール１を一つのセル群９としてとらえ、接続箱６１を複数のモジュール１ごとに１個設け、その接続箱６１に備えられる各中継端子６３を介して各モジュール１にバイパスダイオード２１を並列接続することにより、この接続箱６１の各バイパスダイオード２１によって各モジュール１のバイパスを行うようにしてもよい。   In the present embodiment, a connection box 61 is provided for each module, and the bypass diode 21 is connected in parallel to each cell group 9 in the module 1 via each relay terminal 63 provided in the connection box 61. Although each cell group 9 provided in the single module 1 is bypassed by each bypass diode 21 of the connection box 61, one module 1 is regarded as one cell group 9, and the connection box 61 is a plurality of cells. One module is provided for each module 1, and the bypass diode 21 is connected in parallel to each module 1 via each relay terminal 63 provided in the connection box 61. A bypass may be performed.

本発明の一実施形態に係る端子の取付方法が適用された太陽電池モジュール間接続箱の内部構成を示す平面図である。It is a top view which shows the internal structure of the connection box between solar cell modules to which the attachment method of the terminal which concerns on one Embodiment of this invention was applied. 図１の接続箱の断面図である。It is sectional drawing of the connection box of FIG. 図１の接続箱に用いられる中継端子が複数連続的に連なって形成された端子連続体の平面図である。FIG. 2 is a plan view of a terminal continuum formed by continuously connecting a plurality of relay terminals used in the junction box of FIG. 1. 図１の接続箱に備えられる接続箱本体の中継端子等が備えられる前の状態の平面図である。It is a top view of the state before the relay terminal etc. of the connection box main body with which the connection box of FIG. 1 is provided are provided. 図４のＶ−Ｖ断面図である。It is VV sectional drawing of FIG. 図４のVI−VI断面図である。It is VI-VI sectional drawing of FIG. 図４のVII−VII断面図である。It is VII-VII sectional drawing of FIG. 図４のVIII−VIII断面図である。It is VIII-VIII sectional drawing of FIG. 図４の側面図である。FIG. 5 is a side view of FIG. 4. 図１の接続箱の組立工程を示す図である。It is a figure which shows the assembly process of the junction box of FIG. 図１の接続箱の組立工程を示す図である。It is a figure which shows the assembly process of the junction box of FIG. 図１の接続箱の組立工程を示す図である。It is a figure which shows the assembly process of the junction box of FIG. 太陽電池モジュールが家屋の屋根に設置されている様子を示す斜視図である。It is a perspective view which shows a mode that the solar cell module is installed in the roof of a house. 図１３の太陽電池モジュールの斜視図である。It is a perspective view of the solar cell module of FIG. 図１３の太陽電池モジュールの電気的構成を示す回路図である。It is a circuit diagram which shows the electrical constitution of the solar cell module of FIG. 端子の一取付方法が適用された接続箱の内部構成を示す平面図である。It is a top view which shows the internal structure of the connection box to which the one attachment method of the terminal was applied. 図１６の接続箱の断面図である。It is sectional drawing of the connection box of FIG.

符号の説明Explanation of symbols

１…太陽電池モジュール
７…太陽電池セル
９…太陽電池セル群
１１，１３…出力ケーブル
２１…バイパスダイオード
４３…中継ケーブル
６１…太陽電池モジュール間接続箱
６３…中継端子
６５…端子連続体
６７…接続箱本体
６９…切離し部
７３…取付孔
８７…端子用ボス部
９３，９５…固定金具用ボス部
９７，９９…固定金具
９７ａ，９９ａ…取付孔 DESCRIPTION OF SYMBOLS 1 ... Solar cell module 7 ... Solar cell 9 ... Solar cell group 11, 13 ... Output cable 21 ... Bypass diode 43 ... Relay cable 61 ... Connection box 63 between solar cell modules ... Relay terminal 65 ... Terminal continuous body 67 ... Connection Box body 69 ... Separation part 73 ... Mounting hole 87 ... Terminal boss parts 93 and 95 ... Fixing bracket boss parts 97 and 99 ... Fixing brackets 97a and 99a ... Mounting holes

Claims (3)

接続箱内には、複数の太陽電池セル群同士を直列に接続させるために、それぞれが対応する前記太陽電池セル群と中継ケーブルを介して接続された複数の端子が並列して収納されるとともに、
前記端子のうち、両端に位置するものには前記複数の太陽電池セル群からの起電力を取り出すための出力ケーブルが接続され、さらに隣接する端子同士の間には、対応する前記太陽電池セル群に対して並列となるようにバイパスダイオードが接続される太陽電池モジュール用接続箱であって、
前記各端子は隣り合うもの同士が切除可能な切り離し部によって接続された連続体とされ、かつこの連続体はさらに前記バイパスダイオードが接続されてユニット化された状態で前記接続箱内へ設置可能であり、
かつこのユニット化された状態における各端子は前記接続箱の底面から突設されたボス部によって位置決めされて固定がなされることを特徴とする太陽電池モジュール用接続箱。 In the connection box, in order to connect a plurality of solar battery cell groups in series, a plurality of terminals connected via the relay cables and the corresponding solar battery cell groups are accommodated in parallel. ,
Among the terminals, those located at both ends are connected to an output cable for taking out electromotive force from the plurality of solar cell groups, and between the adjacent terminals, the corresponding solar cell groups A junction box for a solar cell module to which a bypass diode is connected in parallel with
Each of the terminals is a continuous body connected by a detachable separating part, and the continuous body can be installed in the junction box in a state where the bypass diode is connected and unitized. Yes,
And each terminal in this unitized state is positioned and fixed by a boss projecting from the bottom surface of the connection box, and the connection box for solar cell modules. 前記端子には方形の取付孔が開口する一方、前記ボス部はこの取付孔に挿通される方形に形成され、かつ挿通後に熱圧潰されることにより前記端子は抜け止めがなされることを特徴とする請求項１記載の太陽電池モジュール用接続箱。 The terminal is provided with a square mounting hole, while the boss is formed in a square shape that is inserted into the mounting hole, and the terminal is prevented from coming off by being thermally crushed after insertion. The connection box for solar cell modules according to claim 1. 前記各端子は、基部とこの基部から少なくとも三方向へ張り出して前記中継ケーブル、バイパスダイオードあるいは出力ケーブルと接続される突出部とを備えて形成されていることを特徴とする請求項１又は請求項２記載の太陽電池モジュール用接続箱。 2. The terminal according to claim 1, wherein each terminal includes a base and a projecting portion that protrudes from the base in at least three directions and is connected to the relay cable, the bypass diode, or the output cable. The connection box for solar cell modules according to 2.
JP2004190310A 1997-10-27 2004-06-28 Junction box for solar cell module Expired - Fee Related JP3744528B2 (en)

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JP9293934A JPH11135169A (en) 1997-10-27 1997-10-27 Fitting method of terminal and terminal continuum to be used therein
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CN101783488B (en) * 2010-01-19 2012-01-04 浙江大学 Separating type solar assembly junction box

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